Depending on your problem..
if it slips you have to adjust both adjustent bolts
in the back of the treadmill.
If it's tracking to one side, the side that it goes to needs to be tighter. Only turn 1/4 turn at a time until belt is aligned.
see my video at www.mindbites.com/person/214-Mark
YOU CAN EMAIL ME FROM THERE IF YOU NEED TO.
Mark Peterson
Mark Peterson, February 2008